So far today, Stefanski, Carroll, Morris and Gannon were fired by lunch time. If Glenn were to go, I don't know why there'd be much delay in announcing it. So, I fear he may be back for another year.
If Moore stays another year, it is 100% he doesn't want to be a Jet. He's going #2 so he can't really improve his overall stock and he's risking injury. Peyton Manning returned to Tennessee instead of becoming a Jet so he wouldn't be the first.
Next year doesn't matter with or without him. They have so much to fix, anyone will look like an improvement. Next year is another 4 win season and either you drafted your QB this year or next. Then another 4-5 win season.